JP6703671B2 - Ion generator for organic substance decomposition treatment and organic substance decomposition treatment device - Google Patents

Description

The present invention relates to an ion generator for organic substance decomposition treatment and an organic substance decomposition treatment device, and is suitable for application to, for example, an organic substance decomposition treatment device for decomposing raw garbage such as vegetable waste.

BACKGROUND ART Conventionally, there is known a food waste treatment device that uses an active oxygen species when decomposing organic substances such as food waste (for example, see Patent Document 1). In Patent Document 1, for example, as active oxygen species, superoxide (O ₂ ·−), hydroxy radical (·OH), hydrogen peroxide (H ₂ O ₂ ), monovalent oxygen ( ¹ O ₂ ), ozone. It is disclosed that food waste put into the storage tank is decomposed by using (O ₃ ).

Such a garbage treatment device using active oxygen species has advantages such as methane gas being less likely to be generated during the decomposition treatment and suppressing a rotten odor, as compared with a garbage treatment device using bacteria. ..

JP, 2017-189413, A

By the way, since there is a possibility that various organic substances other than the raw garbage such as paper materials may be mixed in the raw garbage thrown into such a raw garbage processing apparatus, considering the labor such as separation, etc. Therefore, it is desired to develop an organic substance decomposition treatment device having a higher decomposition treatment capacity than before. Further, from the viewpoint of further shortening the time required for the decomposition treatment, it is desired to improve the decomposition treatment capacity.

Therefore, an object of the present invention is to provide an ion generator for organic substance decomposition treatment and an organic substance decomposition treatment device capable of further improving the decomposition treatment ability of organic substances as compared with the prior art.

The ion generator for organic matter decomposition treatment according to the present invention is an ion generator for organic matter decomposition treatment for generating ions for decomposing and treating organic matter stored in a storage tank, which is a needle electrode and a flat plate arranged opposite to each other. An electrode and a direct current power supply unit for applying a positive direct current voltage to the needle electrode, wherein the direct current power supply unit sets the direct current voltage to a predetermined voltage value, and the needle electrode and A voltage control unit for generating a positive corona discharge is provided between the flat plate electrodes.

Moreover, the organic substance decomposition processing apparatus which concerns on this invention is provided with the said ion generation apparatus for organic substance decomposition processing in the said storage tank.

According to the present invention, an oxonium ion having a high ability to decompose an organic substance can be generated. Therefore, by using the oxonium ion, the ability to decompose an organic substance can be further improved as compared with the conventional case.

It is a schematic diagram showing the whole organic substance decomposition processing equipment by the present invention. FIG. 2A is a schematic diagram showing the configuration of the electrode structure, and FIG. 2B is a schematic diagram showing the front configuration of the electrode structure. It is a graph used for description of electron affinity. It is a graph for use in describing the relationship between the evaporation rate v and the heat of vaporization L _V. 6 is a graph showing the number density of oxonium ions at a position separated by a distance x from the generation position of oxonium ions. Evaporation mass of the contained polymer absorber is measured for the case of irradiation with oxonium ion, the case of irradiation with negative ion and ozone, the case of irradiation with only negative ion, and the case without irradiation of ion etc. It is a graph which shows the measured result. Measure the remaining mass of the polymer absorber contained in the case of irradiation with oxonium ions, in the case of irradiation with negative ions and ozone, in the case of irradiation with only negative ions, and in the case without irradiation of ions. It is a graph which shows the measured result. It is a graph which shows the measurement result which each measured the evaporation mass of the contained polymer absorber about the case where it was irradiated with oxonium ion from the position 50 cm away from the contained polymer absorber, and the case where it was not irradiated with ions and the like. .. It is a graph which shows the measurement result which measured the residual mass of each containing polymer absorber about the case where it was irradiated with oxonium ion from the position 50 cm away from the containing polymer absorber, and the case where it was not irradiated with ions and the like. .. 6 is a graph showing the measurement results obtained by measuring the evaporation mass of water in the case of irradiation with oxonium ions and in the case of not irradiation with ions. It is a graph which shows the measurement result which each measured the residual mass of water in the case where it was irradiated with oxonium ion, and the case where it was not irradiated with ion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Structure of organic substance decomposition processing apparatus of the present invention>
FIG. 1 is a schematic diagram showing the overall configuration of an organic substance decomposition processing apparatus 1 according to the present invention. The organic substance decomposition processing apparatus 1 has a configuration capable of decomposing various organic substances such as polymer and paper materials in addition to food waste such as vegetable waste using oxonium ions. The oxonium ion is, for example, a hydronium ion, oxatriquinane, oxatriquinacene, or the like, which is a positive ion. In this case, the organic substance decomposition processing device 1 includes a storage tank 2 into which organic substances are charged, a blower 3, and an organic substance decomposition processing ion generation device 4.

The organic substance to be decomposed is charged into the storage tank 2 through the charging port 2a and stored in the storage tank 2. The organic matter after the decomposition process can be discharged to the outside from the discharge port 2b of the storage tank 2. In this case, the organic substance decomposition processing apparatus 1 is internally provided with a heater and a stirrer (not shown), and while irradiating the organic matter in the storage tank 2 with the oxonium ions generated by the organic substance decomposition processing ion generation device 4, By heating and stirring the organic material, the water content of the organic material is evaporated and decomposed.

The blower 3 and the organic substance decomposing ion generating device 4 are installed at predetermined positions in the storage tank 2, and the blower 3 and the organic substance decomposing ion generating device 4 are connected by a pipe 5. The blower 3 sucks outside air and sends the sucked gas to the organic substance decomposing/processing ion generator 4 through the pipe 5. The gas delivered from the blower 3 into the organic substance decomposing treatment ion generating device 4 passes through the inside of the organic substance decomposing treatment ion producing device 4 and is delivered into the storage tank 2.

The ion generator 4 for organic substance decomposition processing includes a housing 8 in which an electrode structure described later is installed, and a DC power supply unit 9. The housing 8 is provided with an inlet (not shown) that is connected to the pipe 5 and that introduces the gas discharged from the blower 3 into the housing 8. Further, the housing 8 is provided with an outlet (not shown) communicating with the storage tank 2 and discharging the gas from the blower 3 into the storage tank 2.

The housing 8 forms a sealed space inside, and when gas from the blower 3 is introduced into this sealed space, it is directed from the inlet to the outlet via the electrode structure (described later). It forms an air flow through which gas flows. As a result, the casing 8 causes the internally generated oxonium ions to be delivered from the discharge port into the storage tank 2.

The DC power supply unit 9 generates a positive DC voltage and applies it to the electrode structure inside the housing 8. The DC power supply unit 9 has a voltage control unit 10 capable of controlling the voltage value of the DC voltage, and the voltage control unit 10 sets the DC voltage to a predetermined voltage value. Thereby, the voltage control unit 10 can generate positive corona discharge in the electrode structure and generate oxonium ions in the electrode structure. At this time, the voltage control unit 10 sets the voltage value of the DC voltage to an optimum value in order to generate oxonium ions having a high decomposition treatment capacity for organic substances.

<About electrode structure>
Next, the electrode structure installed in the housing 8 of the organic substance decomposing treatment ion generator 4 will be described below. As shown in FIG. 2A, the electrode structure 11 includes a needle electrode 12, a plate electrode 13, and an electrode support member 14. The electrode support member 14 is made of an insulating material such as polyvinyl chloride, and is formed in a cylindrical shape, and supports the needle electrode 12 and the flat plate electrode 13.

In addition, although the case where the cylindrical electrode support member 14 is applied as the cylindrical electrode support member has been described in the present embodiment, the present invention is not limited to this, and for example, a square tubular shape such as four sides or polygons. You may apply the electrode support member which consists of.

The electrode support member 14 supports the needle electrode 12 and the flat plate electrode 13 so as to face each other in the hollow space ER1 surrounded by the cylindrical inner wall portion 14a. The electrode support member 14 is arranged between the introduction port and the discharge port (not shown) of the housing 8 (FIG. 1). Thereby, when the gas from the blower 3 is introduced into the housing 8 through the inlet, the airflow flowing in one direction along the central axis X in the hollow space ER1 (for example, the arrow direction of the central axis X), It is formed in the hollow space ER1.

More specifically, it is desirable that the electrode support member 14 is arranged in the housing 8 so that the inlet and the outlet of the housing 8 are arranged on the central axis X of the hollow space ER1. In particular, by directing the open end of the electrode support member 14 in the hollow space ER1 toward the discharge port of the housing 8, an airflow that linearly connects the discharge port from the hollow space ER1 can be formed. As a result, oxonium ions (described later) generated in the hollow space ER1 can be prevented from hitting the inner wall of the housing 8 or the like, and the oxonium ions can be directly guided to the discharge port.

As shown in FIG. 2B, the electrode support member 14 is selected such that the inner diameter Y ₂ between the cylindrical inner wall portions 14 a is 25±5 mm and the outer diameter Y ₃ is 32±5 mm.

As shown in FIG. 2B, the needle electrode 12 and the flat plate electrode 13 are arranged so as to oppose each other on one orthogonal line Y orthogonal to the central axis X of the hollow space ER1, and the needle-shaped tip portion 12a of the needle electrode 12 is provided. The flat plate portion 13b of the flat plate electrode 13 is arranged immediately below. The needle electrode 12 is formed of a metal material such as tungsten and has a diameter of 0.1 to 2 mm. The needle electrode 12 is provided so as to penetrate the cylindrical inner wall portion 14a of the electrode support member 14, and the needle-shaped tip portion 12a is exposed in the hollow space ER1.

The plate electrode 13 is formed of, for example, a metal material such as stainless steel, and includes a rod-shaped support portion 13a and a flat plate portion 13b formed at an end of the support portion 13a. The flat plate portion 13b is formed in a disk shape having a diameter of 5 to 20 mm and a thickness of 1.5±1 mm. The support portion 13a is provided so as to penetrate the cylindrical inner wall portion 14a of the electrode support member 14, and exposes the flat plate portion 13b in the hollow space ER1.

In the present embodiment, the needle electrode 12 and the supporting portion 13a of the flat plate electrode 13 are provided so as to penetrate the cylindrical inner wall portion 14a, but the present invention is not limited to this. For example, the tip of the root portion of the needle electrode 12 may be fixed to the surface of the cylindrical inner wall portion 14a, and the needle electrode 12 may be provided so as not to penetrate the cylindrical inner wall portion 14a. Also, with respect to the flat plate electrode 13, the supporting portion 13a or the flat plate portion 13b may be fixed to the surface of the cylindrical inner wall portion 14a so as not to penetrate the cylindrical inner wall portion 14a.

The inter-electrode distance Y ₁ between the needle-shaped tip portion 12a of the needle electrode 12 and the flat plate portion 13b of the flat plate electrode 13 facing the needle-shaped tip portion 12a is selected to be 20 mm, for example. The inter-electrode distance Y ₁ is not limited to 20 mm, and is basically defined by the voltage value (kV) of a positive DC voltage described later and the electric field strength (kV/mm).

Here, as shown in FIG. 2A, the root portion of the needle electrode 12 exposed to the outside of the electrode support member 14 is connected to the voltage control unit 10. Further, in the case of this embodiment, the plate electrode 13 is connected to the ground. The flat plate electrode 13 may be connected to the voltage control unit 10 without being connected to the ground, and a negative DC voltage may be applied thereto to function as the negative electrode.

In the case of the configuration in which the plate electrode 13 is connected to the ground, the electric field strength is 0.25 to 1.5 kV/mm and the voltage value is 5 as the positive DC voltage applied to the needle electrode 12 by the voltage control unit 10. It is desirable that the voltage is ˜30 kV. By setting the electric field strength of the positive DC voltage to 0.25 to 1.5 kV/mm, the positive corona discharge can be stably generated at the inter-electrode distance Y ₁ .

Even when the electric field strength of the DC voltage is 0.25 to 1.5 kV/mm, when the voltage value of the DC voltage of the positive polarity is less than 5 kV, sufficient oxonium ions necessary for decomposing the organic matter are generated. Hard to generate. In addition, when the voltage value of the positive DC voltage is more than 30 kV, the condition for maintaining the stability of the discharge becomes much more severe than when the voltage value is 30 kV or less, which is not practical from the viewpoint of maintenance. It may decrease. Therefore, it is desirable to set the voltage value of the positive polarity DC voltage to 5 to 30 kV while setting the electric field strength of the DC voltage to 0.25 to 1.5 kV/mm.

As described above, when the DC voltage having the above-described voltage value is applied to the needle electrode 12, a steady non-uniform electric field is generated between the needle electrode 12 and the flat plate electrode 13 in the atmospheric pressure, and the positive corona discharge is generated. Occurs. As a result, oxonium ions can be generated in the hollow space ER1 serving as the discharge space.

The difference between vacuum discharge and atmospheric discharge is described. Consider the case where the same needle electrode 12 and flat plate electrode 13 are used and kV/mm is fixed and the voltage and the distance between the electrodes are changed. In vacuum, the electric field strength distribution has a similar shape. However, in the atmosphere, the electric field intensity distribution is not always similar because it is affected by a small amount of positive and negative ions. As the distance between the electrodes increases, the influence of positive and negative ions is increased, so that it becomes difficult to secure the stability of discharge.

Here, as one of the main reactions that generate ions in the discharge space, there is a generation reaction of molecular ions. In order for the gas molecule M to be ionized and separated into the molecular ion M ⁺ and the electron e ⁻ , it is necessary to give the gas molecule M more energy than the ionization energy of the gas molecule M. In the discharge space under atmospheric pressure, this energy is given by the collision of electrons accelerated in the glow region of high electric field.

The primary ions generated by the discharge travel in the electric field along the lines of electric force according to their polarities. The primary ions traveling toward the plate electrode 13 collide with the gas existing in the discharge space and the discharge by-products derived from the neutral radical species A., [MB]. Cause various ionic molecule reactions, and change to longer-lived ionic species. This process continuously occurs while moving in the drift region, and the final ions are generated through sequential ion molecule reactions.

In the case of positive corona discharge in the atmosphere, oxonium ions are the final ions regardless of the discharge conditions. The generation and evolution process of oxonium ions in a positive corona discharge in the atmosphere are predicted based on the measured values of the rate constants of elementary reactions. According to this, for example, among oxonium ions, hydronium ions have N ₂ ^+· and O ₂ ^+· generated by ionization in the glow region as primary ions, and undergo a development process mainly involving H ₂ O. Is generated through.

<Oxidizing power of oxonium ions>
Next, the oxidizing power of oxonium ions will be described. Atoms become stable by the amount of energy they release. The electron affinity is the energy released when one electron is taken into the outermost shell. A large electron affinity means that there is a high tendency for the electron to be taken from the object and to stabilize itself. That is, it can be said that a large electron affinity means a strong oxidizing power.

FIG. 3 is a graph showing the relationship between atomic number and electron affinity. When compared within the same period, the electron affinity of halogen elements such as fluorine (F) and chlorine (Cl) is maximized. The electron affinity of chlorine is very large, 3.617 eV. When it is usually ionized, it becomes a monovalent anion. Here, consider the electron affinity of a monovalent cation of an atom. The first ionization energy of an atom refers to the energy required to remove one electron from the outermost shell of the atom to form a monovalent cation. That is, it can be said that “the electron affinity of a monovalent cation of an atom” and “the first ionization energy of the atom” are equal.

In the same cycle, the first ionization energy of the rare gas is extremely large, but it is difficult to ionize the rare gas by, for example, discharging. Except for rare gases, the only elements having a higher first ionization energy than hydrogen are nitrogen, oxygen, fluorine and chlorine. Basically, fluorine and chlorine do not exist alone. Nitrogen and oxygen do not become monovalent cations, for example, in discharge. Therefore, hydrogen ions have the highest electron affinity of monovalent cations.

For example, among oxonium ions, a hydronium ion is a bond between H ⁺ and H ₂ O, so that the electron affinity (oxidizing power) of the hydronium ion is about 13.6 eV, which is equal to the electron affinity of hydrogen ion. Conceivable. From this value, it can be said that the oxidizing power of hydronium ions is much higher than the redox potential of active oxygen species.

Next, a verification test was conducted to confirm the strength of the oxidization power of oxonium ions. In this verification test, the electrode structure 11 shown in FIGS. 2A and 2B was produced, and oxonium ions were generated using this. Here, a needle electrode 12 made of tungsten and having a diameter of 1 mm, a disk-shaped plate electrode 13 made of stainless steel and having a diameter of 10 mm and a thickness of 1.5 mm, an inner diameter Y ₂ of 25 mm, and an outer diameter Y ₃ of 32 mm, a thickness of An electrode structure 11 as an example was produced using the electrode supporting member 14 made of polyvinyl chloride having a thickness of 1.4 mm.

In this example, the inter-electrode distance Y ₁ was 20 mm, 20 kV was applied to the needle electrode 12 as a positive DC voltage, and the plate electrode 13 was connected to ground. As a result, discharge could be confirmed between the needle electrode 12 and the flat plate electrode 13. This discharge is a positive corona discharge because a positive DC voltage is applied to the needle electrode 12 and the plate electrode 13 is connected to the ground.

Then, a plurality of iron nails were prepared, the open end of the electrode supporting member 14 was brought close to the iron nails, and positive corona discharge was continuously generated for about 48 hours. Separately from this, as a comparative example, a negative ion/ozone generator (Murata's negative ion generator MHM305 and Murata's negative ion/ozone generator MHM306) was prepared. The nails were kept exposed to negative ions and ozone for about 48 hours. Similarly, the setting conditions for irradiating the negative ions and ozone were such that the plurality of iron nails were continuously irradiated with the negative ions and ozone for about 48 hours. The applied voltage was set to 2 kV according to the specifications of the product.

As a result, in the example, it was visually confirmed that the entire surface of the iron nail turned black and rusted. On the other hand, in the comparative example, it was visually confirmed that the surface of the iron nail was almost in the original silver color and almost no rust was generated. As described above, it was confirmed that the example has a stronger oxidizing power than the comparative example using the active oxygen species.

<Relationship between Oxonium Ion Oxidizing Power and Drying Power>
Here, the boiling point of water is 100° C. and the heat of vaporization is 2250 kJ/kg. The boiling point of ethanol is 80.3°C, and the heat of vaporization is 393 kJ/kg. The boiling point of ether is 34.5°C, and the heat of vaporization is 327 kJ/kg. Thus, it can be seen that water has an extremely large heat of vaporization. It is thought that this is because water molecules have polarities and hydrogen bonds work to form clusters called clusters.

When converting 2250 kJ/kg, which is the heat of vaporization of water, per molecule of water, it is about 0.4 eV. When, for example, a hydronium ion approaches a water molecule forming a cluster, an oxidative force (electron affinity) of 13.6 eV is exerted to strip off an electron forming a hydrogen bond, and the electron has a high energy (about 13 eV). ) Is expected to change to free electrons. It can be expected that the high-energy free electrons collide with the electrons forming hydrogen bonds and further convert the electrons into high-energy free electrons.

Irradiation with oxonium ions can be expected to reduce the size of cluster molecules by causing a chain of oxidation reactions. In recent years, the structure and stability of water clusters have been studied by experiments and calculations. Computational chemistry has investigated the structures of cyclic clusters (H ₂ O) _n with n ranging from 3 to 60. It has been obtained that the distance between oxygen atoms shrinks as the ring grows larger.

It is believed that this is because the molecules that have received hydrogen by hydrogen bonding have a change in the distribution of charge and the ability to donate hydrogen, so that when the aggregate of water becomes large, the hydrogen bonding is cooperatively strengthened. This means that the heat of vaporization decreases as the size of the cluster decreases. Several isomers of the hexamers of water molecules are expected, and it is calculated that cyclic, booklet-shaped, bag-shaped, cage-shaped, and prism-shaped ones have almost the same stability. Two types of cage-type isomers have been obtained for the heptamer by calculation, and for the octamer, a cyclic type and a cubic type have been calculated. Further, as a huge cluster, a fullerene-type 28-mer “bucky water” and a cluster of 280 water molecules in an icosahedral shape are calculated as having a minimum energy value. In recent years, water clusters have also been analyzed by the ab initio method (a non-empirical method).

Here, the evaporation rate of the water and v, when the heat of vaporization and L _V, for the relationship of the evaporation rate v and vaporization heat L _V, Clapeyron (Clapeyron) - the equation of Clausius (Clausius) expressed as follows be able to.

v=v _O ·exp(−L _V /k _B T) (1)
Here, v _O represents an integration constant, kB represents a Boltzmann constant, and T represents temperature.

FIG. 4 shows the value of v/v _O as a function of the heat of vaporization L _V. It can be seen from FIG. 4 that the evaporation rate v increases as the heat of vaporization L _V decreases. Therefore, by irradiating with oxonium ions, a chain of oxidation reactions occurs, and when the size of cluster molecules becomes smaller and the heat of vaporization becomes smaller, the evaporation rate becomes higher. Therefore, when an organic substance is irradiated with oxonium ions, it can be expected that more water is evaporated with the same energy. The verification test of the drying ability using oxonium ions will be described later in "Examples".

<Action and effect>
In the above-described configuration, in the organic substance decomposing treatment ion generating device 4, the needle electrode 12 and the plate electrode 13 are arranged to face each other, and the DC power supply unit 9 applies a positive DC voltage to the needle electrode 12. The DC power supply unit 9 sets the DC voltage to a predetermined voltage value by the voltage control unit 10 and causes positive corona discharge between the needle electrode 12 and the flat plate electrode 13 under atmospheric pressure.

As a result, in the organic substance decomposing treatment ion generating device 4, the positive corona discharge generated between the needle electrode 12 and the flat plate electrode 13 can generate oxonium ions having a high organic substance decomposing ability. Thus, in the organic substance decomposing/treating ion generator 4, by using oxonium ions for decomposing the organic substance, the decomposing ability of the organic substance can be further improved as compared with the conventional case.

Further, in the ion generating device 4 for organic substance decomposition treatment, the needle electrode 12 and the plate electrode 13 are arranged to face each other in the hollow space ER1 of the electrode supporting member 14 to generate a positive corona discharge. As a result, the organic substance decomposing treatment ion generator 4 can discharge the oxonium ions only from the opening end of the cylindrical electrode supporting member 14, so that it is intended by selecting the direction of the opening end. Oxonium ions can be intensively delivered only in the direction. Thus, the ion-decomposing apparatus 4 for organic substance decomposition treatment can suppress the oxonium ions from being radially scattered in the housing 8 and can scatter the oxonium ions further in the intended direction. ..

Furthermore, in the organic substance decomposition treatment ion generator 4, the electrode support member 14 is arranged such that the discharge port of the housing 8 is located on the central axis X of the hollow space ER1 and is introduced into the housing 8 from the introduction port. The gas from the blower 3 passes through the hollow space ER1 and is linearly sent to the outlet. As a result, in the organic substance decomposition treatment ion generation device 4, the oxonium ions generated in the hollow space ER1 can be directly introduced into the storage tank 2 from the discharge port. Thus, it is possible to limit the location where the oxonium ions are sprayed in the housing 8 and to prevent the interior of the housing 8 from being damaged by the oxonium ions having a strong oxidizing power.

<Other Embodiments>
The present invention is not limited to the above embodiment, and can be modified as appropriate within the scope of the spirit of the present invention. For example, the electrode structure 11 may be provided at various positions inside the housing 8. Further, as the organic substance decomposition treatment apparatus 1, the case where the organic substance is decomposed by heating and stirring the organic substance at the same time in addition to the irradiation of the organic substance with oxonium ions has been described, but the present invention is not limited to this. For example, an organic substance decomposition treatment device that only irradiates an organic substance with oxonium ions, or an organic substance decomposition treatment device that only heats or agitates an organic substance in addition to irradiating an organic substance with an oxonium ion, Good.

Next, as in the above-described embodiment using the electrode structure 11, a positive DC voltage of 20 kV is applied to the needle electrode 12, the plate electrode 13 is connected to the ground, and the positive corona is applied at atmospheric pressure. A discharge was generated. Then, a verification test was conducted to examine the number density of the generated oxonium ions. Here, the measurement position is moved away from the electrode structure 11, and the number density of the oxonium ions generated in the electrode structure 11 is measured at a predetermined distance x by an ion counter (manufactured by Ion Trading Co., Ltd., trade name: Ion Counter NKMH- It was measured with 103 (ultra wide range type), and as a result, the result was obtained as shown in FIG.

In FIG. 5, ◯ indicates the measured value measured by the ion counter, and the solid line indicates the measured value fitted with an exponential function. It is considered that about 50 million pieces/cm ³ or more of oxonium ions are generated near the distance x=0 cm. As shown in FIG. 5, the number density of oxonium ions gradually decreased as the distance x was increased. Therefore, it was confirmed that it is desirable to install the electrode structure 11 at a position close to the organic substance to be decomposed so that the oxonium ions directly reach the organic substance.

Next, a verification test was conducted to evaluate the drying ability of oxonium ions. Here, 100 g of polymer absorbents (hereinafter referred to as contained polymer absorbents) that have absorbed a sufficient amount of water are separated, and four hydrous polymer absorbents are prepared and placed in containers (tappers). It was Then, as in the above-described embodiment using the electrode structure 11, a DC voltage of 20 kV is applied to the needle electrode 12 to generate a positive corona discharge, and the generated oxonium ion is added to the water content of the first eye. The molecular absorber was irradiated.

For the second water-containing polymer absorber, use the negative ion/ozone generator (Murata Negative Ion Generator MHM305 and Murata Negative Ion/Ozone Generator MHM306) prepared as Comparative Example 1. Irradiated with ions and ozone. Similarly, the setting conditions for irradiating the negative ions and ozone were such that the plurality of iron nails were continuously irradiated with the negative ions and ozone for about 48 hours. The applied voltage is 2 kV according to the product specifications.

For the third water-containing polymer absorber, the negative ion generator (Murata Negative Ion Generator MHM305 and Murata Negative Ion/Ozone Generator MHM306) prepared as Comparative Example 2 was used, and only negative ions were used. Was irradiated. The setting condition when irradiating with negative ions was that the applied voltage was 2 kV according to the product specifications.

The fourth hydrous polymer absorber was naturally dried without being irradiated with oxonium ions, negative ions, ozone, or the like.

Then, the evaporation mass and the residual mass of each of the four contained polymer absorbers were measured every 12 hours until 48 hours had elapsed. As a result, the results shown in FIGS. 6 and 7 were obtained. In FIG. 6 and FIG. 7, the measurement result of the example is “this device” and is indicated by ◯. The measurement result of Comparative Example 1 is shown by □, the measurement result of Comparative Example 2 is shown by Δ, and the measurement result without irradiation is shown by X.

Here, the residual mass was measured with TANITA KD-192, and the evaporated mass was determined by subtracting the residual mass from the initial mass. From FIG. 6 and FIG. 7, it was confirmed that Comparative Example 1 irradiated with negative ions and ozone and Comparative Example 2 irradiated with only negative ions had almost no difference in evaporation mass and residual mass from those in the case of no irradiation.

On the other hand, in the case of irradiating with oxonium ions, which is an example, the evaporation mass becomes extremely large and the remaining mass becomes extremely small as compared with Comparative Examples 1 and 2 and no irradiation. I was able to confirm that.

Next, after preparing the same water-containing polymer absorber as in the above-described verification test and placing the electrode structure 11 of the example at a position about 50 cm away from the water-containing polymer absorber, with respect to the contained polymer absorber. Irradiated with oxonium ions. With respect to the contained polymer absorber, the evaporation mass and the residual mass were measured every 12 hours until the elapse of 48 hours, and the results shown in FIGS. 8 and 9 were obtained.

FIG. 8 and FIG. 9 show the measurement results when there is no irradiation as a comparative example. As shown in FIGS. 8 and 9, it was confirmed that the evaporated mass became extremely large and the residual mass became extremely small even when the electrode structure 11 was separated from the hydrous polymer absorbent body by about 50 cm. Therefore, it was confirmed that the evaporation amount of water can be sufficiently secured even when the electrode structure 11 is separated from the water-containing polymer absorber by 50 cm.

Next, two containers (tappers) were prepared, and 100 cc of water was put in each container. Then, the electrode structure 11 was installed in the first container at an obliquely upper position separated by about 5 cm from the container. Next, the water in the container was irradiated with oxonium ions generated in the electrode structure 11. The water in the remaining container was left as it was. Then, when the evaporation mass and the residual mass of water were measured every 12 hours until the elapse of 48 hours, the results shown in FIGS. 10 and 11 were obtained.

As an example, it was confirmed that when the oxonium ion was irradiated, the evaporated mass became extremely large and the residual mass became extremely small as compared with the case of leaving it to stand (denoted as no irradiation in the figure).

As described above, in the embodiment in which the needle electrode 12 and the flat plate electrode 13 are supported by the tubular electrode supporting member 14 and a high DC voltage of 20 kV is applied to the needle electrode 12, water is removed even at a distance of 5 cm or 50 cm. It was confirmed that it has a great effect on evaporation. With the configuration of the example, the flight speed of the oxonium ions generated in the electrode structure 11 is increased, and it is estimated that the oxonium ions fly farther.

DESCRIPTION OF SYMBOLS 1 Organic substance decomposition treatment apparatus 2 Storage tank 3 Blower 4 Ion generator for organic matter decomposition treatment 8 Housing 9 DC power supply unit 10 Voltage control unit 12 Needle electrode 13 Flat plate electrode 14 Electrode support member

Claims (4)

An ion generating device for organic substance decomposition treatment for generating ions for decomposing organic substances stored in a storage tank,
A needle electrode and a flat plate electrode arranged to face each other,
A DC power supply unit for applying a positive DC voltage to the needle electrode,
Equipped with
The DC power supply unit ,
Wherein a voltage value of the DC voltage is set to 5 to 30 kV, and the field intensity and 0.25~1.5kV / mm, generating a positive polarity corona discharge between the needle electrode and the plate electrode in the atmosphere have a voltage control unit for,
An ion generator for organic substance decomposition treatment , which generates oxonium ions by generating the positive corona discharge . A tubular electrode support member that supports the needle electrode and the flat plate electrode,
2. The electrode supporting member according to claim 1, wherein the needle electrode and the flat plate electrode are arranged to face each other in a hollow space surrounded by a cylindrical inner wall portion to generate the positive corona discharge in the hollow space. Ion generator for organic substance decomposition treatment. The electrode support member includes a housing installed inside,
The housing is provided with an inlet for introducing the gas discharged from the blower, and an outlet for discharging the gas into the storage tank,
The electrode support member is arranged such that the discharge port is located on the central axis of the hollow space,
The ion generator for organic substance decomposition treatment according to claim 2, wherein the casing allows the gas introduced from the introduction port to pass through the hollow space and linearly discharge toward the discharge port. An organic substance decomposition treatment device, wherein the ion generation device for organic substance decomposition treatment according to any one of claims 1 to 3 is provided in the storage tank.

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